COMPARATIVE ASSESSMENT OF THE USUAL FROST CRITERIA FOR FROST BLANKETING SANDY GRAVEL, FROM ORIGINAL PUBLICATIONS

VERGLEICHENDE BEURTEILUNG DER GEBRAEUCHLICHEN FROSTKRITERIEN FUER FROSTSCHUTZKIESSANDE ANHAND DER ORIGINALVEROEFFENTLICHHUNGEN

FROM A STUDY OF THE ORIGINAL PUBLICATIONS, IT IS INTENDED TO ESTABLISH WHETHER THE CRITERION FOR FROST PROTECTION BASED ON ZTVE-STB 65 ( A PROPORTION OF NOT MORE THAN 3% OF PARTICLE SIZES D BELOW 0.02 MM) IS JUSTIFIED. A COMPARATIVE EXAMINATION WILL BE MADE OF THE TEST CONDITIONS AND THEORETICAL FORMULAE ON WHICH THE VARIOUS STATEMENTS HAVE BEEN BASED. THEN INVESTIGATION COVERS WORK IN WHICH THE FROST CRITERION WAS DERIVED FROM THE PARTICLE SIZE DISTRIBUTION, THE PERMEABILITY OR THE CAPILLARY RISE.